Palanychko O. Riverbed formation regylarities in Peredkarpattia

Dissertation Thesis for Candidate Degree in Geography (11.00.07 - Surface Hydrology. Water Resources. Hydrochemistry). - Faculty of Geography, Kyiv Taras Shevchenko University, Kyiv, 2010. Grounding on the archives materials as well as on her own research, the author disclosed regional and general regularities in the riverbed formation in rivers with huge alluvial riverbeds in places where stream outcomes onto widened valley bottom areas. The influence of major factors of riverbed formation was studied on the basis of a functional-basin scheme for conditions of alluvial plains. The scheme of basic rivers' division into homogeneous plots was developed and supplemented within the limits of the territory of investigation. For the above purpose, a method that takes into account the ability of the hydro-net, the bottom of river valley and the "stream-riverbed" system itself to sensitively react on local condition changes for the period of many years was used. This allowed for widening of the idea of temporal-spatial changes' morphology and morpho-dynamics in the Peredkarpattia riverbeds. Regularities in sequence of riverbed formation along the stream while the river moves away from the mountains were disclosed. That is, general regularities of riverbed formation in rivers with huge alluvium in conditions of their moving away from mountains were supplemented and made more precise on the basis of the empirical materials on the Peredkarpattia. Basing on our research, geo-hydro-morphological classification of the riverbeds and huge-alluvial riverbeds on the whole in Peredkarpattia rivers was made more precise and developed. Riverbed types within huge-alluvial riverbed (HAR) sub-classes 3-5 were classified and such classification was substantiated. Problems of riverbed and flood-lands use in the Peredkarpattia rivers were outlined and analyzed, as well as ways for problem solution were suggested. Key words: geo-hydro-morphological analysis, riverbed processes, riverbed morphology and morphological dynamics, alluvial plains, huge-alluvial riverbeds, homogeneous plots, riverbed formation expenses, dominant forms, regularities, alluvial sediments and drifts.